package com.itheima.lambda.test2;

public class CalculatorDemo {
    public static void main(String[] args) {
        useCalculator(new Calculator() {
            @Override
            public int calc(int a, int b) {
                return a + b;
            }
        });

        useCalculator((a, b) -> a + b);
    }

    public static void useCalculator(Calculator calculator){
        int result = calculator.calc(10,20);
        System.out.println("result = " + result);
    }
}

interface Calculator{
    int calc(int a, int b);
}